Core guide



J. R. M WANE CORE GUIDE igOriginal Filed May 24, 1926. 2 Sheets-Sheet '1 M66 18. JfoWzrze,

INVENTOR,

WITNESSES ATTORNEY Feb. 19, 1929. 1,702,657

1 J. R. MGWANE GORE-GUIDE Original Filed May 24', 1926 2 Sheets-Sheet 2 mfjz.1.%)adile mvzmoh, 1 WITNESSES '0 I BY ,n

ATTORNEY Patented Feb. 1929.

I YUANTED STATES PATENT OFFICEL JAM S RQMc'WANE, or B RM GHAm ALABAMA,AssIeNoR TO MCWANE oAs'r mon PIIBE ooiv riiny, OEIBIRMINGHAM, ALABAMA, A CORPORATION or ALABAMA.

3 001m GUIDE.

Application filed May 24, 1926; 80:1111 No. 111,218. Renewed October 17, 1928a This invention'relates to core guides for positioning elongated cores in molds for cast ing pipeor other tubular castings by the horizontal method.

-An object is to provide means onthe drag section of a flask, may beput in exact longitudinal and lateralposition relative to the mold, so as to insure a casting having walls with no thin places, which would be areas of weakness in high pressu'rework;

Another object is to provide simple, strong and durable means which may be readily formed integrally with the said drag section, and made true and accurate by machining the same, so as to coact with the extended end portion of the core bar-being loweredinto position by travelling crane or otherwise, and to cause'said core bar to be directed to the'exact center of the mold, after which, byv a simple longitudinalshifting movement' of the core barthe same is stopped, by the improved means,in the exact lengthwise position de-' sired. r' i A further object is to provide guiding means for core bars of this character which will permit the latter to be loweredinto posi-.

tion therein, no matter what the. rotaryposition of the bar about-lts own axis may be, thus greatly facilitating the operation which may be watched and directed by a single operative, it being understood that the saidgu-iding means is preferably located only at the bell end of the flask, and that the bell end ofv the.

drawings forming a part of this specification,

it being understood that while the drawings show a practical form-of the invention, the

latter is not to be confined to strict conformity with the showing thereof, but may be changed or-modified, so long as such changes or modi fications mark no material departure from the salient features of the invention, asspecifical- 1y pointed out in the appended claims.

In the drawings, in which similar reference characters designate corresponding parts throughout the several figures Figure 1 is a plan view of a double pipe flask, partly broken away, the cores being held that t e present improved guidin may be used in connection therewit as the in position therein and in coaction with the improved guiding means. I Figure 2 is an end elevation of the bell end of the flask, drawn on an enlarged scale and showing the core bars in section and in coaction with the guides.

Figure 3 is a horizontal sectional View through the flask of Figure 2.

Figure 4 is a vertical sectional View throughat a single pouring of the molten metal; but

it is to be understood-that the invention may also be incorporated in a single pipe flask or in one Where three, four or more castings are made. at one time.

Furthermore there have been illustrated in A the drawing certain meansfor rigidly holdmg the core bars from sagging from their own weight or from being elevated orfloated at their intermediate portions by the inflowing molten metal, but such means forms no part of the present nvention and no claim is made thereto in thepresent application, it.

havin been included herein merely to show same forms the subject matter of mypatent on means for supporting core bars in flasks,

means 2 No.'1,601,450, which has been reissued as Reissue No. 17,121.

As shown in the acting cope section 2 adapted to be inverted drawing, the flask coinprises the usual drag section 1 andftheco.

molds have been formed therein. At each end the drag section is provided with a relatively heavy end wall 3, while the cope section is likewise provided with similar end walls 4, each joining longitudinal side walls of the drag and cope respectively to form open, rec- I 'tangular frames fitting each other, and;

adapted to permit the sand to be readily shaken out after casting.

The drag section is provided with a'series o'ftransverse, integrally formed webs 5 to strengthen the structure, while the cope is also provided with similar webs 6 for the same purpose.

As has been stated, the guides are preferably located at the bell end of the flask, and no attempt has been made in the drawing to fully illustrate in detail the other or spigot end of the flask and cores. The end walls 3 and 4, however, at each end of the flask, are each provided with a semi-circular opening coacting, when placed together, to form a complete circular opening for the adjacent end of the core bar to project through, that opening in the drag section being indicated at 7 and the corresponding opening in the cope at 8. The diameter of the combined openings 7 and 8 is somewhat larger than the diameter of the core bar which extends centrally through the same, and the aforesaid transverse web 5 next adjacent to the bell end wall 3 of thedrag is provided with a semicircular opening or seat 9, which is of the same diameter as the core bar. There is a corresponding seat (not shown) at the other greater diameter than the core bar 11 and does not touch the latter, and it will be understood that all the other intermediate, reinforcing webs arranged transversely of the cope and drag sections of the flask are provided with coacting, semi-circular openings of greater diameter than the core on the core bar.

As shown in Figure 1 of the drawings the core bars extend beyond the end walls of the flask sections, and it will be seen that the areas between the end walls and the next adjacent transverse webs are devoid of sand when the molds are made in the flask, said areas being utilized for the location of clamping and holding means as has been mentioned herein.

The bell ends of the illustrative core bars 11 are reduced adjacent to their terminals, and between the shoulders 12 thus formed and the ends of the bars, there is provided an outstanding, annular flange 13, preferably formed integrally therewith, and having a diameter greater than the core bar, all of said parts being carefully and accurately turned round, so that it does not matter what angular position the core bar may be in when lowered to be guided by the improved means to be described.

Beneath each core bar and in exact vertical line with the centers thereof, there is provided an outstanding lug 14 cast integrally on the outer face of the end walls of the drag section, and at their outer ends said lugs are suitably apertured and threaded for the reception of set screws 15 adapted to bear upwardly against the under sides of the core bars during the operation of tensioning the latter. Longitudinal arms 16 located midway between the core bars, and beneath the same are integrally connected at their ends to the end walls 3 and the next adjacent trans verse webs 5 of the drag sections, and said arms are provided with suitable sockets for the detachable reception of the heads of bolts 17, which extend vertically between the core bars, one at each end, and each bolt is adapted to draw a yoke 18 downwardly upon the tops of the core bars in opposition to the aforesaid machined seats 9 and the set screws 15 to hold the bars in a manner fully set forth in the aforesaid reissue.

At the bell end, the drag section 1 is provided with an integrally formed, central, outstanding lug 19, (Fig. 5), the same merging into the outer face of the end wall 3, as indicated at 20, and the upper end portion of said lug is reduced in width, longitudinally of the flask, thus providing a space 21 between the inner face of said lug and the outer face of the drag section, the upper end of the lug being located somewhat above the joint between the cope and drag sections, as clear ly shown in Figure 4 of the drawings.

The central lug 19 is provided on its opposite side faces with inner, vertical ribs 22 which extend somewhat above and below the centers of the extended ends of the core bars, and the outer faces of said ribs are accurately machined to contact with the inner sides of the two core bars when the latter are in exact axial alinement with the molds in the flask. See Figs. 2 and 3. The upper ends of the ribs 22 are bevelled outwardly, as shown at 23, to provide flaring entrance openings and to deflect the bars to the proper position when the latter are being lowered. The ribs 22 engage the core bars adjacent to the aforesaid shoulders 12, as clearly shown in Figure 3. The central lugs 19 are furthermore provided with outer ribs 24, parallel to the ribs 22 and having their upper ends similarly bevelled at 25 for a similar purpose. The side faces of the outer ribs 24 are a greater distance from the centers of the core bars than the corresponding faces of the ribs 22, so as not to contact with the cylindrical walls of the core bars as do said ribs 22, see Fig. 3. The outer faces of the ribs 24, which are suitably machined, are adapted to contact with the inner annular faces of the flanges 13 of the core bars, and to act as stops when the core bars rest upon the seats 9, and are moved inwardly to bring the said flanges against said ribs 24.

Coacting with the central lugs are outer lugs 26 formed integrallywith the drag section as at 30 to facilitate the guiding of the core bars into position. j

It will be clear that if the flask is used for casting only one pipe length at a time, the central lug 19 with its guides will not be used, but two outer lugs 26 will be on opposite sides of the single core bar. On the other hand, if more than two pipe lengths are cast in a single flask, there will be two or more lugs 19, one lug '19 being between each pair of adjacent core bars.

Any suitable form of lug or extension 31 may be formed on the drag section for lifting the same, or for lifting the entire flask, and the cope section may also be provided with suitable lifting'lugs (not shown) for permitting thetwo members to be separately lifted and reversed or otherwise handled to remove the sand therefrom, etc.

' From the foreaoin g it will be seen that simple means have been provided for accurately directing cor-e bars or the like into proper position within a mold or in a seat, said means being readily formed integrally with the flask section and serving to permit careful inspection by a single operative while the core bars or the like are being lowered by overhead power means, with the result thatthe cores are placed with absolute accuracy in the desired longitudinal and lateralpositi0n, with out damage to the sand mold or the sand core, and that it is immaterial what rotary position the cores may be in when lowered in the slingsfito be properly engaged and directed by the coacting ribs 22 and .28, the other ribs 24 and 29 serving to stop the flanges 13 with the cores in exact longitudinal position with.- in the molds.

What is claimed is 1. A flask for casting pipe or similar tubu lar objects horizontally, said flask being com posed of a cope and a drag section, each having coacting openings to permit the core bar to extend therethrough, guides formed integrally with the drag section and extending above the center of the core bar and at each side thereof, and means formed on the core bar for coaction with the guides to position the core bar both laterally and longitudinally.

2. In a flask for casting pipe or the like in a horizontal position, a cope and a drag section each having coacting, semi-circular end openings, a core bar adapted to be supported in the flask and to extend at each end through said openings, upstanding lugs formed integrally on one end of the drag section and extending above the center of the core bar at either sidelthereof where projecting through the flask, said lugs having their inner, opposed sides provided with machined faces where contacting with the core bar to laterally guide the same into position, and a machined, annular flange formed on the core bar to contact with the outer faces of the lugs to longitudinally guide the core bar intoposit-ion.

3. In a flask for the horizontal casting of pipe or the like, a cope and a drag section, a core supported in the flask and having the ends of the bar thereof extended through the ends of said flask, lugs formed integrally on the outer face of the bell end wall of the said drag section and extending upwardly at either side of the core bar, said lugs having spaced inner and outer, vertically disposed, machined ribs on their opposed faces, the inner ribs being adapted to contact with the core bar at either side to laterally position the core in the mold Within the flask, and a machined, annular flange formed near the end of the core bar and adapted to abut against the said outer ribs of the lugs to longitudinally position the said core in said mold. a 1 v I 4. Means for guiding a core in a mold for horizontally casting pipe or the like, comprising a flask having a cope and a drag section, said sections having coacting openings at each end, a core supporting bar adapted to be supported in the flask with the ends thereof projecting through said openings, spaced lugs formed integrally on the outside of one wall of the drag section and extending upwardly in spaced relation to said end wall, said lugs having'spaced, vertically disposed, inner and outer ribs formed on their inner, opposed sides, the upper ends of the ribs being bevelled outwardly to provide tapered entrances for facilitating the lowering of the core bar and core into the drag sect-ion of theflask, the opposedfaces of the inner ribs being closer together than those of the outer ribs and adapted to contact with the opposite sides of the core bar in any rotary position of the latter and guide the same into accurate lateral position in the mold, and an outstanding, circumferential flange formed on one end of the core bar and adapted to abut against the outer faces of the outer ribs to longitudinally position the core in the flask.

In a flask for casting pipe horizontally, a cope section and a drag section each provided with one or more complementary, semicircular openings formed in the end walls thereof, one or more core supporting bars adapted to be supported in the flask with the ends thereof projecting through said openings, guide lugs formed integrally on the outer face of the bell end wall of the drag section, said lugs extending upwardly above the center line of said bar or bars, each lug having a vertical guide rib to contact with the side of the adjacent bar and position same laterally in the mold, each lug also having an outer vertical stop rib, and an outstanding, annular flange formed on the end of each core bar to abut against the outer face of the outer ribs to properly locate the core bars lengthwise of the molds.

6. A flask for casting pipe and the like horizontally con'iprising, in combination, a cope; a drag; a core bar; means to clamp the core bar in the mold; and guiding means on the drag so arranged as to contact with the core bar near one end thereof and serve as a stop to prevent inward longitudinal movement of the core bar such as would weaken or destroy the casting.

7. A flask for casting pipe and the like horizontally comprising, in combination, a cope; a drag; a core bar; the core bar extending beyond the ends of the flask; guides formed integrally with the drag at either side of the core bar; and means formed on the core bar beyond or outside of the guides for coaction with the guides to properly position the core bar longitudinally.

8. A flask for casting pipe and the like horizontally comprising, in combination, a cope; a drag; a core bar; the drag having machined webs near its ends providing seats for the core bar; the core bar projecting beyond said seats; and co-operating means provided on the drag and on the core bar for preventing such inward longitudinal movement of the core bar as would Weaken or destroy the casting.

9. A flask for casting pipe and the like horizontally comprising, in combination, a cope; a drag; a core bar; the drag having machined webs near its ends providing seats for the core bars; said seats being semicircular to receive the core bar and make a nice fit and prevent lateral movement thereof; the core bar projecting beyond said seats; and co-operating means provided on the drag and on the core bar for preventing such inward longitudinal movement of the core bar as would weaken or destroy the casting.

10. A flask for casting pipe or similar tubular objects horizontally, said flask being composed of a cope and a drag section, each having matching openings to permit the core bar to extend therethrough, guides formed integrally with the drag section and at each side of the core bar, and means formed on the core bar for coaction with the guides to position the core bar both laterally and longitudinally.

11. Means for guiding a core in a mold for horizontally casting pipe or the like, comprising a flask having a cope and a drag section, said sections having matching openings at each end, a core supporting bar adapted to be supported in the flask with the ends thereof projecting through said openings, spaced lugs formed integrally on the outside of one wall of the drag section and extending upwardly in spaced relation to said end Wall, said lugs having vertically disposed ribs, the upper ends oi" the ribs being bevelled outwardly to provide tapered entrances for facilitating the lowering of the core bar into the drag section of the flask, and an out-standing, circumferential flange formed on one end of the core bar and adapted to abut against the outer faces of the ribs to longitudinally position the core in the flask.

12. In combination, a flask section having means for longitudinally guiding a core bar, said means consisting of a projection on one end wall of the flask section; and a projection on the core bar for contact with the outside of the projection on the flask section, thus guiding the core bar.

In testimony, that I claim the foregoing as my own, I have hereto aflixed my signature.

JAMES R. MoWANE. 

